Insulated support for electrical devices.



A. W. BURKE.

INSULATED SUPPORT FOR ELECTRICAL DEVICES. APPLICATION FILE! MAR.I61M9l4.

1,162,747, Patented Dc.7,1915.

UNITED STATES PATENT OFFICE.

ALFRED W. BURKE, OF WILMINGTON, DELAWARE.

INSULATED SUPPORT FOR ELECTRICAL DEVICES.

means.

Specification of Letters Patent.

Patented Dec. '7, 1915.

Original application filed June 14, 1911, Serial No. 633,098. Dividedand this application filed March 16,

1914. Seri.a.1No.825,042.

To all whom it may concern Be it known that I, ALFRED WV. BURKE, asubject of the King of Great Britain, residing at lVilmington, in thecounty of New Castle and State of Delaware, have invented certain newand useful Improvements in Insulated Supports for Electrical Devices, ofwhich the following is a specification.

My invention relates to improvements in insulated supports forelectrical devices, or parts thereof, consisting of means to be attachedto insulators and the like, and has for its object the production of asimple, strong, and quickly attached means to be fastened to ordinarycommercial types of high-tension insulators, such as used in connectionwith high voltage transmission.

This application is a division of my copending application filed Junel4,v 1911, Serial N 0. 633,098.

In the accompanying drawing,-Figure l is a view of the cap, partiallybroken away, to be fastened to the insulator; Fig. 2 is another view ofthe same, partially broken, on the line II-II of Fig. 1; Fig. 3 is asectional view of an incomplete ring, on the line IIIIII of Fig. 4, tosecure the cap to an insulator; Fig. 4 is a plan view of the ring; Fig.5 is a horizontal section on the line V-V of Fig. 6, showing the cap andring mounted on an insulator; Fig. 6 is a view showing an insulator inelevation with the cap and incomplete ring mounted thereon; and Fig. 7illustrates a plurality of caps secured to insulators, and supporting aswitch as used in high voltage transmission.

Referring to the drawings, the insulator 8, shown in Figs. 6 and 7, isof the well-known high tension type, and has a circumferential groove 28and a transverse groove 31 on the top. A close-fitting incomplete ring,27, is sprung into the groove 28,and extends more than half way aroundthe same so as toselfengage it; over the top of the insulator is placeda cap 29, the depending flange 40 of which projects down and inclosesthe incomplete ring 27. On the inner side of the end of the cap is adepending transverse ridge 32, which engages the groove 31 in theinsulator preventing any turning of the cap. Passing through the flange40 of the cap are set screws 30 firmly engaging the ring 27, as shown inFigs. 5 and 6, and immovably securing the cap to the insulator. On thetop of the cap are webs 33, 34, in which are screw-threaded holes 35 andscrews 36 which serve to secure switch elements 37, or other electricaldevices, as shown in Figs. 6 and 7.

I claim: I

1. In a support f r electrical devices, the combination of acircumferentially grooved insulator, a cap having a depending portion, adetachable element self-engaging said groove, and means to secure saiddepending portion of the cap to said detachable element.

2. A switch insulator-cap, having a depending flange to receive aninsulator head, a close-fitting incomplete ring to engage the insulatorgroove, and screws threaded through said flange and bearing against saidring.

3. In a support for electrical devices, the combination of acircumferentially and transversely grooved insulator, a cap having adepending portion to engage said trans verse groove, a depending flangeon said cap, an incomplete ring in said circumferential groove, andmeans securing said depending flange to said ring.

In testimony whereof I afiix my signature in presence of two witnesses.

, ALFRED W. BURKE.

Witnesses JAMES W ROBERTSON, RUTH M. THAWLEY,

